Originally Posted by JimC

Ivan it has nothing to do with the number of cylinders. With the timing chain on the back of the passenger side head it is very difficult to do. The 4.6 is easy and everything accessible. Not the case on the 4.0. You can't watch a video or read a swap on the 4.6 and apply that to the 4.0. Very different set up. The set up means you have LESS room to work with despite 2 fewer cylinders

The easiest way to swap on the 4.0 is pull the engine so you can get to the back of the passenger side head. I'm not sure it can be done with the engine in the car, at least not easily

Originally Posted by JJHoover

not to mention these cams have to be degreed, there is no way to get a degree wheel on the back of the motor while it is in the car IMO.

If anyone has done it I would like to hear how.